488
FNCA52 TJSJ 311930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST MON AUG 31 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-010800-
SOUTHEAST COASTAL PLAINS-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 30 10 20
TEMP (24H TREND) 75 (-2) 91 (+3) 75 92
RH % (24H TREND) 93 (-1) 58 (-10) 92 57
WIND 20FT/EARLY(MPH) E 14 E 12 E 12 E 12
WIND 20FT/LATE(MPH) NE 9 E 14 NE 9 E 16
MIXING HGT(FT-AGL/MSL) 5380 5030
TRANSPORT WND (MPH) E 13 E 13
VENT RATE (KT-FT) 59180 55330
DISPERSION 5 5
DSI 4 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-010800-
SOUTHERN HILLS-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 10 30
TEMP (24H TREND) 71 (-3) 89 (+5) 71 90
RH % (24H TREND) 98 (+1) 61 (-11) 98 60
WIND 20FT/EARLY(MPH) E 12 E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 9 SE 11 NE 8 E 11
MIXING HGT(FT-AGL/MSL) 6190 5500
TRANSPORT WND (MPH) E 9 E 12
VENT RATE (KT-FT) 49520 55000
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-010800-
NORTH COASTAL PLAINS-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 50 30 50
TEMP (24H TREND) 75 (-2) 91 (+1) 74 92
RH % (24H TREND) 98 (+2) 61 (-6) 98 60
WIND 20FT/EARLY(MPH) SE 12 E 12 E 11 E 11
WIND 20FT/LATE(MPH) SE 6 E 16 SE 8 E 17
MIXING HGT(FT-AGL/MSL) 5040 4670
TRANSPORT WND (MPH) E 12 E 13
VENT RATE (KT-FT) 50400 51370
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-010800-
NORTHERN HILLS-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 80 10 70
TEMP (24H TREND) 72 (-3) 90 (+2) 72 91
RH % (24H TREND) 99 (-1) 65 (-5) 99 64
WIND 20FT/EARLY(MPH) SE 10 E 11 E 10 E 10
WIND 20FT/LATE(MPH) SE 5 E 12 SE 6 E 13
MIXING HGT(FT-AGL/MSL) 6350 5430
TRANSPORT WND (MPH) E 8 E 10
VENT RATE (KT-FT) 44450 48870
DISPERSION 5 5
DSI 2 6 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-010800-
WEST COAST-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY CLEAR PCLDY
PRECIP TYPE TSTMS TSTMS NONE TSTMS
CHANCE PRECIP (%) 40 70 0 60
TEMP (24H TREND) 74 (-1) 92 (+1) 73 93
RH % (24H TREND) 99 (0) 62 (-5) 99 62
WIND 20FT/EARLY(MPH) E 17 E 11 E 9 E 10
WIND 20FT/LATE(MPH) E 16 E 12 E 6 E 12
MIXING HGT(FT-AGL/MSL) 5320 4730
TRANSPORT WND (MPH) SE 8 E 7
VENT RATE (KT-FT) 37240 28380
DISPERSION 5 5
DSI 5 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-010800-
EASTERN INTERIOR-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 30 30
TEMP (24H TREND) 73 (-3) 90 (+3) 73 91
RH % (24H TREND) 99 (+3) 60 (-10) 99 59
WIND 20FT/EARLY(MPH) SE 11 E 10 E 10 E 10
WIND 20FT/LATE(MPH) SE 9 E 11 E 9 E 11
MIXING HGT(FT-AGL/MSL) 6050 6080
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 54450 66880
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-010800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 60 50 50
TEMP (24H TREND) 70 (-3) 86 (+4) 71 87
RH % (24H TREND) 100 (+1) 65 (-11) 100 64
WIND 20FT/EARLY(MPH) SE 9 E 9 E 9 E 10
WIND 20FT/LATE(MPH) E 6 E 10 E 6 E 10
MIXING HGT(FT-AGL/MSL) 4790 4870
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 43110 53570
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-010800-
CENTRAL MOUNTAIN RANGE-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS NONE TSTMS
CHANCE PRECIP (%) 50 70 0 60
TEMP (24H TREND) 69 (-3) 87 (+5) 69 88
RH % (24H TREND) 100 (+1) 68 (-9) 99 67
WIND 20FT/EARLY(MPH) SE 10 E 6 E 6 E 6
WIND 20FT/LATE(MPH) E 8 E 8 E 5 E 9
MIXING HGT(FT-AGL/MSL) 7250 6230
TRANSPORT WND (MPH) SE 6 E 8
VENT RATE (KT-FT) 36250 43610
DISPERSION 5 5
DSI 2 5 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-010800-
CAYEY MOUNTAIN RANGE-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 50 30 30
TEMP (24H TREND) 72 (-1) 86 (+4) 70 87
RH % (24H TREND) 100 (+1) 65 (-11) 100 63
WIND 20FT/EARLY(MPH) E 10 E 9 E 9 E 10
WIND 20FT/LATE(MPH) E 5 E 10 NE 6 E 10
MIXING HGT(FT-AGL/MSL) 5710 5320
TRANSPORT WND (MPH) E 13 E 13
VENT RATE (KT-FT) 62810 58520
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-010800-
VIEQUES-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 50 50
TEMP (24H TREND) 80 (0) 91 (+2) 79 91
RH % (24H TREND) 84 (-2) 56 (-5) 83 56
WIND 20FT/EARLY(MPH) E 17 E 12 E 12 E 11
WIND 20FT/LATE(MPH) E 12 E 12 E 11 E 11
MIXING HGT(FT-AGL/MSL) 3310 3180
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 43030 34980
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-010800-
CULEBRA-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 50 50
TEMP (24H TREND) 79 (-2) 91 (+2) 79 91
RH % (24H TREND) 86 (-2) 58 (-9) 87 58
WIND 20FT/EARLY(MPH) E 17 E 12 E 12 E 11
WIND 20FT/LATE(MPH) E 13 E 12 E 11 E 10
MIXING HGT(FT-AGL/MSL) 3420 3210
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 44460 35310
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-010800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY CLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 60 40 0 30
TEMP (24H TREND) 75 (-2) 93 (+3) 75 93
RH % (24H TREND) 92 (-1) 57 (-8) 91 57
WIND 20FT/EARLY(MPH) E 21 E 16 E 11 E 14
WIND 20FT/LATE(MPH) E 19 SE 17 E 10 E 17
MIXING HGT(FT-AGL/MSL) 5730 4910
TRANSPORT WND (MPH) SE 15 E 13
VENT RATE (KT-FT) 74490 54010
DISPERSION 5 5
DSI 5 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-010800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50 50
TEMP (24H TREND) 79 (-1) 89 (+2) 79 89
RH % (24H TREND) 87 (-1) 60 (-7) 87 59
WIND 20FT/EARLY(MPH) E 18 E 12 E 13 E 11
WIND 20FT/LATE(MPH) E 12 E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL) 3390 3140
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 44070 37680
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-010800-
ST CROIX-
330 PM AST MON AUG 31 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 50 50
TEMP (24H TREND) 79 (-1) 90 (+2) 79 90
RH % (24H TREND) 88 (-2) 62 (-6) 87 61
WIND 20FT/EARLY(MPH) E 19 E 13 E 12 E 11
WIND 20FT/LATE(MPH) E 14 E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL) 4670 4590
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 60710 55080
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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